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07 November 2008

An analytical and experimental study of the bow wave generated by a ship in steady motion is reported. Simple analytical expressions are given for the height of water at the stem, the height of the bow wave, the distance between the crest of the bow wave and the ship stem, and the shape of the bow wave. Furthermore, a simple criterion that defines if a ship in steady motion generates an unsteady bow wave is given. Finally, a simple, fully-analytical, nonlinear theory that explicitly defines an overturning ship bow wave in terms of main design parameters is given. In spite of their remarkable simplicity, these analytical results are in reasonable agreement with experimental observations and measurements for a number of non bulbous hull forms with wedge-shaped bows, and for a rectangular flat plate towed at a yaw angle and a heel angle.

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